Submission #1043292

#	Time	Username	Problem	Language	Result	Execution time	Memory
1043292		guagua0407	Jobs (BOI24_jobs)	C++17	11 / 100	75 ms	33876 KiB

Main

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int mxn=3e5+5;
vector<int> adj[mxn];
vector<ll> x(mxn);
vector<ll> dp(mxn);

void dfs(int v,int p=-1){
    dp[v]=x[v];
    for(auto u:adj[v]){
        dfs(u,v);
        if(dp[u]>0) dp[v]+=dp[u];
    }
}

int main() {_
    int n;
    ll S;
    cin>>n>>S;
    vector<int> p(mxn);
    for(int i=1;i<=n;i++){
        cin>>x[i]>>p[i];
        adj[p[i]].push_back(i);
    }
    dfs(0);
    cout<<dp[0]<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz

Compilation message (stderr)

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 14
• Subtask 3: 0 / 15
• Subtask 4: 0 / 29
• Subtask 5: 0 / 31